Yeah, 30 days vacation really isn’t that crazy in the U.S.
tech world at least. I currently get 20 days vacation, an extra 5 available to buy, plus ~13 federal holidays off. I went ahead and bought the extra 5 days for this year since an extra 5 days of vacation was worth more than a marginal $3k or so.
My previous employer had just switched to an “unlimited PTO” policy and had I not been laid off I planned on taking at least 30 days off.